120122

Question : A composite wire of uniform diameter 3.0 mm consisting of a copper wire of length 2.2 m and steel wire of length 1.6 m streched under a load by 0.7 mm. Calculate the load, given that the young's modulus for copper is 1.1×10^11 Pa and for steel is 2.0×10^11 Pa.

Doubt by Saif

Solution :